{"schema":"threatline.record/2","record":{"id":"CVE-2026-100163","aliases":[],"summary":"Appointment Booking Plugin <= 5.7.2 - Unauthenticated Authentication Bypass to Customer Account Takeover via Insufficient Verification in create_wp_user_for_customer() username_exists Fallback","details":"The Appointment Booking Plugin – LatePoint | Calendar & Scheduling for WordPress plugin for WordPress is vulnerable to Authentication Bypass in versions up to, and including, 5.7.2 via the OsCustomerHelper::create_wp_user_for_customer() helper reached from the public process_step_customer() booking step. When the 'Use WordPress users as customers' option is enabled, the helper falls back from email_exists() to username_exists( $customer->email ), which matches any WordPress user whose user_login equals the victim customer's email even when that user's user_email is completely different, and links that WordPress user's ID into the victim's LatePoint customer row (only privileged roles are excluded; Subscriber is allowed). This makes it possible for authenticated attackers, with Subscriber-level access and above, to take over another customer's LatePoint account — accessing their bookings, service, agent, and calendar data, and having the victim customer's email overwritten with the attacker's on next login — by holding a Subscriber account whose user_login equals the victim's email and submitting an unauthenticated public booking step registration request.","categories":["Applications & CMS"],"product":"Appointment Booking Plugin – LatePoint | Calendar & Scheduling for WordPress","vendor":"latepoint","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-100163","source_modified_at":"2026-10-14T17:41:31.054Z","fetched_at":"2026-10-23T18:48:36.087640Z","product":"Appointment Booking Plugin – LatePoint | Calendar & Scheduling for WordPress","vendor":"latepoint","versions":[{"version":"0","status":"affected","lessThanOrEqual":"5.7.2","versionType":"semver"}],"defaultStatus":"unaffected"}],"fixed_versions":[],"cvss":7.4,"severity":"High","kev":{"listed":false},"epss":{"probability":0.00444,"percentile":0.37594,"score_date":"2026-10-23"},"published_at":"2026-10-14T07:43:31.547Z","modified_at":"2026-10-14T17:41:31.054Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-100163","fetched_at":"2026-10-23T18:48:36.087640Z","source_modified_at":"2026-10-14T17:41:31.054Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-100163","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://www.wordfence.com/threat-intel/vulnerabilities/id/2a942d71-7172-4e02-9faa-3a2c1c9e7fbd?source=cve"},{"source":"CVE List","url":"https://plugins.trac.wordpress.org/browser/latepoint/tags/5.7.2/lib/helpers/customer_helper.php#L259"},{"source":"CVE List","url":"https://plugins.trac.wordpress.org/browser/latepoint/tags/5.7.2/lib/helpers/customer_helper.php#L274"},{"source":"CVE List","url":"https://plugins.trac.wordpress.org/browser/latepoint/tags/5.7.2/lib/helpers/steps_helper.php#L2156"},{"source":"CVE List","url":"https://plugins.trac.wordpress.org/browser/latepoint/tags/5.7.2/lib/helpers/steps_helper.php#L2146"},{"source":"CVE List","url":"https://plugins.trac.wordpress.org/browser/latepoint/tags/5.7.2/latepoint.php#L1072"},{"source":"CVE List","url":"https://plugins.trac.wordpress.org/browser/latepoint/tags/5.7.3/lib/helpers/customer_helper.php"}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","ssvc":{"exploitation":"none","automatable":"no","technical_impact":"total","assessed_at":"2026-10-14T17:40:58.748355Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"product","confidence":"heuristic","reviewed":false},"change_timestamp":"2026-10-14T17:41:31.054Z","content_hash":"bf3de5cd722049f1a2a26cc8e473a36d5f449b14fa44af1178d11c262e42bca4"}}